dicated PAR number/approval date: C37.92 - 2000-03-30
If Yes: Is this Project in Ballot now? No
6b. The Project is a: New Standard
7. Working Group Information:

Name of Working Group: Trial-Use Standard for Low Energy Inputs to Protective Relays
Approximate Number of Expected Working Group Members:10
8. Contact information for Working Group Chair:

Name of Working Group Chair: Eric A Udren
Telephone: 412-531-8739 FAX:
Email: EUdren@KEMA.us
9. Contact information for Co-Chair/Official Reporter, Project Editor or Document
Custodian if different from the Working Group Chair:

Name of Co-Chair/Official Reporter, Project Editor or Document Custodian:
Telephone: FAX:
Email:
10. Contact information for Sponsoring Society or Standards Coordinating Committee:

Name of Sponsoring Society and Committee: Power Engineering Society Power System
Relaying
Name of Sponsoring Committee Chair: Richard P Taylor
Telephone: 828-216-3853 FAX: 828-684-5105
Email: rick.taylor@sgswitter.com
Name of Liaison Rep. (if different from the Sponsor Chair): Jeffrey G Gilbert
Telephone: 610-774-4321 FAX: 610-774-6388 PAR FORM
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Email: jggilbert@pplweb.com
Name of Co-Sponsoring Society and Committee:
Name of Co-Sponsoring Committee Chair:
Telephone: FAX:
Email:
Name of Liaison Rep. (if different from the Sponsor Chair):
Telephone: FAX:
Email:
11. The Type of ballot is: Individual Sponsor Ballot

Expected Date of Submission for Initial Sponsor Ballot: May 2002
12. Projected Completion Date for Submittal to RevCom: March 2005

Target Extension Request Information for a Modified PAR whose completion date is
being extended past the original four-year life of the PAR:

ExtState: RevCom suggested PAR extension and modification to address comments of RevCom
members on Scope of successfully balloted document. NumofMem: 10 Meeting: 3 InPerson: 3
TeleCon: 0 Draft: 6 in 2004 DraftStab: 100 DraftRev: 10 DraftBall: 2002-9-12 - D9 - 94%
affirm, 6% neg, 0% abstain. 2004-10-25 - D13 - 98% affirm, 2% (1 vote) neg, 0% abstain
2004-12-13 - D14 - 98% affirm, 2% (1 vote) neg, 0% abstain FirstExt: No PrevExtApp:
24-Jun-2004
13. Scope of Proposed Project:

The scope is to specify the requirements for analog signals from electronic voltage and current
transducers to be used as inputs to protective relays. Requirements to be specified include signal
level, frequency bandwidth, and dynamic range. The standard recognizes that other substation
electronic devices utilizing voltage and current waveform measurements may connect to the
same transducers.

Is the completion of this document contingent upon the completion of another document?
No
14. Purpose of Proposed Project:

Devices that develop or utilize low energy analog signals are not presently covered by standards.
This Standard provides interface connectivity of modern power-system signal transducers, such
as magneto-optic current transducers, and electronic relays. The existing standardized levels from
familiar magnetic current and voltage transformers require energy levels not readily generated by
new types of electronic signal transducers.
15. Reason for the Proposed Project:

There have been no preceding standard signal descriptions for new types of electronic or optical
voltage and current transducers that cannot generate the 120V/5A signals of magnetic potential
and current transformers. A standard is required so that vendors of optical signal transducers can
offer products that will connect to protective relays and other IEDs. These manufacturers exist
and await the publication of C37.92. The relay manufacturers, similarly, need a single standard to
which they can design low-energy interfaces. Utility and industrial users need the standardized PAR FORM
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levels so that they can specify, buy, and connect the relays and new voltage/current sources to
achieve a working system for measurement, control, and protection. The potential community of
users includes all vendors of electronic, optical, or other low-energy transducers of power system
voltage and current signals; all vendors of protective relays and also vendors of other substation
or switchgear intelligent electronic devices (IEDs); and many or most electric utilities.
16. Intellectual Property:
a. Has the IEEE-SA policy on intellectual property been presented to those responsible for
preparing/submitting this PAR? Yes 2004-02-06
b. Is the sponsor aware of copyright permissions needed for this project? No
c. Is the sponsor aware of trademarks that apply to this project? No
d. Is the sponsor aware of possible registration activity related to this project? No
17. Are there other documents or projects with a similar scope? No


Similar Scope Project Information:

18. Is there potential for this document (in part or in whole) to be adopted by another
national , regional or international organization? No

If yes, the following questions must be answered:

Organization Name?

Technical
Committee


International
Contact
Information?

19. Will this project result in any health, safety, or environmental guidance that affects or
applies to human health or safety? No

If yes, please explain:
20. Sponsor Information
a. Is the scope of this project within the approved/scope/definition of the Sponsor's
Charter? Yes
If no, please explain:
b. The Sponsor's procedures have been accepted by the IEEE-SA Standards Board Audit
Committee? Yes
21. Additional Explanatory Notes: (Item Number and Explanation)

In this submission, the scope has been adjusted to reflect the recent title change (requested by
IEEE, and approved in recirculation balloting) that removed the words or idea of "low energy."
Also, the scope has been aligned with the Project Reason that was already documented in
previous PAR versions. This Project Reason statement had recognized that, along with protective
relays, other substation intelligent electronic devices (IEDs) will need to (and can easily)
accomodate the signals specified in C37.92, since these are the voltage and current measurement PAR FORM
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signals that will be available when electronic tranducers have been installed in place of tradtional
magnetic and capacitive insturment transformers. Therefore IEDs are sometimes mentioned or
shown along with relays. The Standard has always focused on the protective relaying
requirements, and refers to other standards for other types of interfaces.